815 Area Code: Location, Cities, Map And Time Zone

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Area Code 815

Area code 815 is in Illinois, USA , spanning 24 counties and serving 248 cities , including Joliet, Rockford or Plainfield; it currently uses 786 prefixes , assigned from 815-200-XXXX through 815-999-XXXX.

In service since January 01, 1947, area code 815 is the parent Numbering Plan Area in overlay complex 815/779.

The current local time is .

815 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 815 area code map

Phone number lookup

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More Illinois area codes:

  • 217
  • 224
  • 309
  • 312
  • 331
  • 447
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  • 618
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  • 708
  • 730
  • 773
  • 779
  • 847
  • 861
  • 872

Locate any 815-NXX prefix:

815-200-XXXX --- 815-299-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-200 La Salle Multiple 6/20/2006
815-201 Sheridan Multiple 8/15/2012
815-202 Oglesby Multiple 4/8/2008
815-203 Joliet USA Mobility Wireless N/A
815-204 Crystal Lake USA Mobility Wireless N/A
815-205 Coal City Multiple 1/31/2014
815-206 Woodstock Multiple N/A
815-207 Joliet Multiple N/A
815-208 Fulton Multiple N/A
815-209 Rockford Multiple 2/4/2002
815-210 Joliet New Cingular Wireless PCS N/A
815-212 Joliet T-Mobile USA N/A
815-213 Sterling Multiple 9/29/2004
815-214 Kankakee Multiple N/A
815-215 New Lenox Multiple 2/4/2002
815-216 Kankakee Multiple N/A
815-217 De Kalb Multiple N/A
815-218 Rockford Cellco Partnership N/A
815-219 Crystal Lake Multiple 6/6/2006
815-220 La Salle Multiple N/A
815-221 Lockport Multiple N/A
815-222 Rockford Cellco Partnership N/A
815-223 La Salle Illinois Bell Tel Co N/A
815-224 La Salle Illinois Bell Tel Co N/A
815-225 Milledgeville Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-226 Rockford Illinois Bell Tel Co N/A
815-227 Rockford Multiple N/A
815-228 Oglesby New Cingular Wireless PCS N/A
815-229 Rockford Illinois Bell Tel Co N/A
815-230 Plainfield Multiple N/A
815-231 Rockford Multiple N/A
815-232 Freeport Frontier North N/A
815-233 Freeport Frontier North N/A
815-234 Byron Multiple N/A
815-235 Freeport Frontier North N/A
815-236 Woodstock New Cingular Wireless PCS N/A
815-237 Gardner Multiple N/A
815-238 Freeport Cellco Partnership N/A
815-239 Pecatonica Multiple N/A
815-240 Rock Cut Multiple 10/18/2010
815-241 Northbrook American Messaging Services N/A
815-242 Minooka Multiple 5/2/2014
815-243 Rockford United States Cellular N/A
815-244 Mount Carroll Brightspeed Of Illinois N/A
815-245 Woodstock New Cingular Wireless PCS N/A
815-246 Earlville Multiple N/A
815-247 Seward Multiple N/A
815-248 Durand Multiple N/A
815-249 Grand Ridge Multiple N/A
815-250 La Salle Multiple 8/25/2006
815-251 Nelson Multiple N/A
815-252 Oglesby New Cingular Wireless PCS N/A
815-253 Kempton Multiple N/A
815-254 Plainfield Illinois Bell Tel Co N/A
815-255 Minooka Multiple 11/3/2009
815-256 Stelle Stelle Tel. Co. N/A
815-257 Streator Cellco Partnership N/A
815-258 Joliet New Cingular Wireless PCS N/A
815-259 Thomson Brightspeed Of Illinois N/A
815-260 Joliet Multiple N/A
815-261 Crystal Lake Multiple N/A
815-262 Rockford Cellco Partnership N/A
815-263 Kankakee Cellco Partnership N/A
815-264 Waterman Multiple N/A
815-265 Gilman Multiple N/A
815-266 Freeport Multiple N/A
815-267 Plainfield Multiple N/A
815-268 Onarga Multiple N/A
815-269 Danforth Multiple N/A
815-270 Roscoe Multiple 4/24/2007
815-271 Mchenry Multiple N/A
815-272 Joliet Multiple N/A
815-273 Savanna Brightspeed Of Illinois N/A
815-274 Joliet New Cingular Wireless PCS N/A
815-275 Freeport Cellco Partnership N/A
815-276 Crystal Lake Multiple N/A
815-277 Frankfort Multiple N/A
815-278 Kankakee Multiple N/A
815-279 Kankakee American Messaging Services N/A
815-280 Joliet Multiple N/A
815-281 Galena Multiple 6/15/2004
815-282 Rockford Illinois Bell Tel Co N/A
815-283 Waterman Multiple 3/5/2010
815-284 Dixon Brightspeed Of Illinois N/A
815-285 Dixon Brightspeed Of Illinois N/A
815-286 Hinckley Multiple N/A
815-287 Verona Multiple N/A
815-288 Dixon Brightspeed Of Illinois N/A
815-289 Rockford United States Cellular N/A
815-290 Minooka Multiple 2/10/2006
815-291 Freeport United States Cellular N/A
815-292 South Bergen Bergen Tel. Co. N/A
815-293 Lockport Multiple N/A
815-294 La Grange USA Mobility Wireless N/A
815-295 Kankakee Multiple N/A
815-296 Rockford Multiple 11/20/2019
815-297 Freeport Multiple N/A
815-298 Rockford Cellco Partnership N/A
815-299 Rockford Multiple N/A
815-300-XXXX --- 815-399-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-300 New Lenox Illinois Bell Tel Co 12/22/2010
815-301 Crystal Lake Multiple N/A
815-302 Joliet Multiple N/A
815-303 Princeton Cellco Partnership N/A
815-304 Kankakee Multiple N/A
815-305 Gardner Multiple N/A
815-306 Lockport Multiple N/A
815-307 Mchenry Multiple N/A
815-308 Woodstock Multiple N/A
815-309 Shannon Aero North Communications 7/18/2006
815-310 Utica Multiple N/A
815-312 Rockford Multiple 12/15/2008
815-313 Ottawa Multiple N/A
815-314 Manhattan Multiple N/A
815-315 Rockford Multiple N/A
815-316 Rockford Level 3 Communications N/A
815-317 Crescent City Multiple N/A
815-318 Morris Multiple N/A
815-319 Rockford Multiple N/A
815-320 New Lenox Multiple 4/28/2009
815-321 Woodstock Multiple N/A
815-322 Mchenry Multiple N/A
815-323 Belvidere Multiple 2/10/2005
815-324 Ottawa Multiple 1/8/2010
815-325 Joliet New Cingular Wireless PCS N/A
815-326 Oglesby Multiple N/A
815-327 Plainfield Level 3 Communications N/A
815-328 Lockport Multiple N/A
815-329 Rockford Multiple 3/11/2013
815-330 Crescent City First Communications N/A
815-331 Mchenry Multiple N/A
815-332 Cherry Valley Multiple N/A
815-333 Woodstock Multiple N/A
815-334 Woodstock Multiple N/A
815-335 Winnebago Multiple N/A
815-336 Coleta Multiple N/A
815-337 Woodstock Illinois Bell Tel Co N/A
815-338 Woodstock Illinois Bell Tel Co N/A
815-339 Granville Multiple N/A
815-340 La Moille Multiple 8/25/2006
815-341 Joliet New Cingular Wireless PCS N/A
815-342 Joliet New Cingular Wireless PCS N/A
815-343 Oglesby New Cingular Wireless PCS N/A
815-344 Mchenry Illinois Bell Tel Co N/A
815-345 Woodstock Multiple N/A
815-346 Gardner Level 3 Communications N/A
815-347 Woodstock Cellco Partnership N/A
815-348 Kankakee Multiple 10/16/2009
815-349 Mchenry Multiple N/A
815-350 Franklin Grove Aero North Communications N/A
815-351 Kankakee Cellco Partnership N/A
815-352 Kankakee Level 3 Communications N/A
815-353 Woodstock Cellco Partnership N/A
815-354 Woodstock Cellco Partnership N/A
815-355 Woodstock Cellco Partnership N/A
815-356 Crystal Lake Illinois Bell Tel Co N/A
815-357 Seneca Multiple N/A
815-358 Cornell C-R Telephone Co. N/A
815-359 Harmon Multiple N/A
815-360 Sublette Aero North Communications N/A
815-361 Manhattan Level 3 Communications N/A
815-362 German Valley Multiple N/A
815-363 Mchenry Illinois Bell Tel Co N/A
815-364 Morris Multiple N/A
815-365 Reddick Multiple N/A
815-366 Ottawa Level 3 Communications N/A
815-367 Winslow Multiple N/A
815-368 Lostant Multiple N/A
815-369 Lena Multiple N/A
815-370 Kankakee Cellco Partnership N/A
815-371 Utica Multiple N/A
815-372 Lockport Multiple N/A
815-373 Elwood Multiple 11/4/2009
815-374 Dwight Multiple 11/4/2009
815-375 De Kalb Multiple N/A
815-376 Ohio Multiple N/A
815-377 Crescent City Level 3 Communications N/A
815-378 Rockford T-Mobile USA N/A
815-379 Walnut Multiple N/A
815-380 Sterling Multiple N/A
815-381 Rockford Illinois Bell Tel Co N/A
815-382 Woodstock New Cingular Wireless PCS N/A
815-383 Crescent City New Cingular Wireless PCS N/A
815-384 Creston Multiple N/A
815-385 Mchenry Illinois Bell Tel Co N/A
815-386 Kankakee Multiple N/A
815-387 Rockford Illinois Bell Tel Co N/A
815-388 Mchenry Multiple N/A
815-389 South Beloit Illinois Bell Tel Co N/A
815-390 Braidwood Multiple 10/14/2004
815-391 Rockford Multiple N/A
815-392 Kinsman Kinsman Mutual Tel. Co. N/A
815-393 Monroe Center Multiple N/A
815-394 Rockford Multiple N/A
815-395 Rockford Illinois Bell Tel Co N/A
815-396 Steward Multiple N/A
815-397 Rockford Illinois Bell Tel Co N/A
815-398 Rockford Illinois Bell Tel Co N/A
815-399 Rockford Illinois Bell Tel Co N/A
815-400-XXXX --- 815-499-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-400 Morrison Multiple 2/15/2010
815-401 Kankakee Multiple N/A
815-402 Galena Multiple N/A
815-403 Mchenry Multiple N/A
815-404 Crystal Lake Multiple N/A
815-405 Joliet Multiple N/A
815-406 Byron Multiple N/A
815-407 Lockport Multiple N/A
815-408 Utica Multiple N/A
815-409 Joliet Multiple 8/18/2005
815-410 La Salle Multiple 2/4/2002
815-412 Frankfort Multiple N/A
815-413 Morris First Communications N/A
815-414 Earlville Multiple 10/14/2004
815-415 Seneca Multiple N/A
815-416 Morris Multiple N/A
815-417 Braidwood Multiple N/A
815-418 Manhattan Multiple N/A
815-419 Pontiac Multiple 3/19/2003
815-420 Rockford Multiple N/A
815-421 Herscher Multiple N/A
815-422 St Anne Multiple N/A
815-423 Elwood Multiple N/A
815-424 Elwood Multiple N/A
815-425 Crystal Lake Level 3 Communications N/A
815-426 Herscher Multiple N/A
815-427 St Anne Multiple N/A
815-428 Martinton Multiple N/A
815-429 Sheldon Multiple N/A
815-430 Mchenry First Communications N/A
815-431 Ottawa Multiple N/A
815-432 Watseka Multiple N/A
815-433 Ottawa Illinois Bell Tel Co N/A
815-434 Ottawa Illinois Bell Tel Co N/A
815-435 Beaverville Multiple N/A
815-436 Plainfield Illinois Bell Tel Co N/A
815-437 Putnam Multiple N/A
815-438 Tampico Multiple N/A
815-439 Plainfield Illinois Bell Tel Co N/A
815-440 Dixon Cellco Partnership N/A
815-441 Sterling Cellco Partnership N/A
815-442 Tonica Tonica Tel. Co. N/A
815-443 Pearl City Multiple N/A
815-444 Crystal Lake Illinois Bell Tel Co N/A
815-445 Manlius Multiple N/A
815-446 Cedarpoint Multiple N/A
815-447 Depue Multiple N/A
815-448 Mazon Multiple N/A
815-449 Dakota Multiple N/A
815-450 Momence Multiple 7/27/2004
815-451 Woodstock Multiple N/A
815-452 Toluca Multiple N/A
815-453 Ashton Multiple N/A
815-454 Sheffield Multiple N/A
815-455 Crystal Lake Illinois Bell Tel Co N/A
815-456 Franklin Grove Multiple N/A
815-457 Cissna Park Multiple N/A
815-458 Braidwood Multiple N/A
815-459 Crystal Lake Illinois Bell Tel Co N/A
815-460 Joliet First Communications N/A
815-461 Lockport MCIMetro Access Transmission Services N/A
815-462 New Lenox Illinois Bell Tel Co N/A
815-463 New Lenox Multiple N/A
815-464 Frankfort Illinois Bell Tel Co N/A
815-465 Grant Park Multiple N/A
815-466 Grant Park Multiple N/A
815-467 Minooka Illinois Bell Tel Co N/A
815-468 Manteno Multiple N/A
815-469 Frankfort Illinois Bell Tel Co N/A
815-470 Rockford Illinois Bell Tel Co N/A
815-471 Watseka Cellco Partnership N/A
815-472 Momence Multiple N/A
815-473 Woodland Multiple N/A
815-474 Joliet New Cingular Wireless PCS N/A
815-475 Plattville Multiple N/A
815-476 Wilmington Multiple N/A
815-477 Crystal Lake Illinois Bell Tel Co N/A
815-478 Manhattan Multiple N/A
815-479 Crystal Lake Multiple N/A
815-480 Rockford USA Mobility Wireless 3/22/2001
815-481 La Grange Cellco Partnership N/A
815-482 Woodstock T-Mobile USA N/A
815-483 Joliet Multiple N/A
815-484 Rockford Multiple N/A
815-485 New Lenox Illinois Bell Tel Co N/A
815-486 Donovan Multiple N/A
815-487 Plainfield First Communications N/A
815-488 La Grange Cellco Partnership N/A
815-489 Rockford Multiple N/A
815-490 Rockford Illinois Bell Tel Co N/A
815-491 Rockford Multiple 3/13/2013
815-492 Apple River Multiple N/A
815-493 Lanark Multiple N/A
815-494 Rockford United States Cellular N/A
815-495 Leland Multiple N/A
815-496 Sheridan Multiple N/A
815-497 Compton Multiple N/A
815-498 Somonauk Multiple N/A
815-499 Sterling United States Cellular N/A
815-500-XXXX --- 815-599-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-500 Marseilles Multiple N/A
815-501 De Kalb Multiple N/A
815-502 Woodstock First Communications N/A
815-503 Mendota Multiple N/A
815-504 Gardner First Communications N/A
815-505 Rockford T-Mobile USA N/A
815-506 Union Multiple 2/27/2002
815-507 Momence Multiple 12/28/2001
815-508 De Kalb Multiple 6/16/2004
815-509 Rockford T-Mobile USA N/A
815-510 Streator Multiple 1/8/2010
815-512 Lockport First Communications N/A
815-513 Morris Multiple 2/27/2002
815-514 Joliet Multiple 1/24/2001
815-515 Watseka Multiple 2/4/2002
815-516 Rockford Multiple 1/24/2001
815-517 De Kalb Multiple 6/28/2004
815-518 Coal City Multiple 10/23/2001
815-519 Rockford T-Mobile USA N/A
815-520 Rockford Cellco Partnership N/A
815-521 Minooka Multiple N/A
815-522 Kirkland Multiple N/A
815-523 Kankakee Multiple N/A
815-524 Lockport Multiple N/A
815-525 South Beloit Tds Metrocom N/A
815-526 Crystal Lake Multiple N/A
815-527 Woodstock Multiple N/A
815-528 Mchenry Multiple N/A
815-529 Woodstock Cellco Partnership N/A
815-530 Joliet Multiple N/A
815-531 Joliet Multiple N/A
815-532 Morris USA Mobility Wireless N/A
815-533 La Grange Indiana Paging Network N/A
815-534 Frankfort Multiple N/A
815-535 Sterling Multiple N/A
815-536 La Grange USA Mobility Wireless N/A
815-537 Prophetstown Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-538 Mendota Multiple N/A
815-539 Mendota Multiple N/A
815-540 Rockford T-Mobile USA N/A
815-541 Freeport United States Cellular N/A
815-542 Thomas Multiple N/A
815-543 Rockford United States Cellular N/A
815-544 Belvidere Frontier North N/A
815-545 Joliet New Cingular Wireless PCS N/A
815-546 Joliet New Cingular Wireless PCS N/A
815-547 Belvidere Frontier North N/A
815-548 Sterling Illinois Bell Tel Co N/A
815-549 Kankakee T-Mobile USA N/A
815-550 Grant Park Multiple N/A
815-551 Lanark Multiple 8/1/2018
815-552 Lockport Multiple 4/10/2001
815-553 Joliet Multiple 4/10/2001
815-554 East Dubuque Multiple N/A
815-556 Plainfield Multiple 4/10/2001
815-557 Joliet Multiple N/A
815-558 Rockford Multiple N/A
815-559 Chenoa Multiple N/A
815-560 Harvard Multiple 5/3/2002
815-561 Rochelle Multiple N/A
815-562 Rochelle Frontier North N/A
815-563 Cedarville Multiple N/A
815-564 Sterling Multiple N/A
815-565 Savanna Multiple N/A
815-566 Belvidere Multiple 6/21/2002
815-567 Campus Multiple N/A
815-568 Marengo Multiple N/A
815-569 Capron Multiple N/A
815-570 Sandwich Multiple 8/21/2002
815-571 Shannon Multiple 4/21/2006
815-572 Marengo Multiple N/A
815-573 Kankakee Multiple 2/27/2002
815-574 Harmon Aero North Communications N/A
815-575 Woodstock Multiple N/A
815-576 Polo Multiple N/A
815-577 Plainfield Illinois Bell Tel Co N/A
815-578 Mchenry Illinois Bell Tel Co N/A
815-579 La Salle Multiple N/A
815-580 Cherry Valley Multiple 3/18/2003
815-581 Spring Grove Multiple 10/6/2005
815-582 Joliet Multiple 10/6/2005
815-583 Morrison Aero North Communications N/A
815-584 Dwight Multiple N/A
815-585 Morris Multiple 5/3/2002
815-586 Ransom C-R Telephone Co. N/A
815-587 Ottawa Multiple 4/2/2002
815-588 Lockport Multiple N/A
815-589 Fulton Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-590 Sterling Multiple 7/14/2003
815-591 Hanover Multiple N/A
815-592 Kankakee Cellco Partnership N/A
815-593 De Kalb Multiple N/A
815-594 Apple River Multiple N/A
815-595 Oregon Multiple 10/2/2003
815-596 Marengo Multiple 2/10/2006
815-597 Garden Prairie Multiple N/A
815-598 Massbach Multiple N/A
815-599 Freeport Multiple N/A
815-600-XXXX --- 815-699-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-600 Joliet Multiple 7/14/2003
815-601 Rockford Multiple N/A
815-602 Kankakee First Communications N/A
815-603 Joliet T-Mobile USA 9/28/2001
815-604 Belvidere Multiple 7/31/2019
815-605 Grant Park Multiple 4/2/2002
815-606 Ottawa First Communications N/A
815-607 Pearl City Onvoy Spectrum 10/01/2024
815-608 Rockford T-Mobile USA 9/30/2002
815-609 Plainfield Illinois Bell Tel Co 10/24/2001
815-610 Hennepin Onvoy 10/30/2024
815-612 Momence New Cingular Wireless PCS 05/16/2025
815-613 Dixon New Cingular Wireless PCS 8/30/2019
815-614 Kankakee Multiple N/A
815-615 Mendota Multiple 10/31/2001
815-616 Freeport Multiple 1/7/2004
815-617 Ottawa Multiple N/A
815-618 Freeport Multiple 12/21/2006
815-619 Rockton Aero North Communications 5/27/2003
815-620 Minooka Multiple 10/31/2018
815-621 Rockford T-Mobile USA N/A
815-622 Sterling Multiple N/A
815-623 Roscoe Multiple N/A
815-624 Rockton Multiple N/A
815-625 Sterling Illinois Bell Tel Co N/A
815-626 Sterling Illinois Bell Tel Co N/A
815-627 Paw Paw Multiple N/A
815-628 West Brooklyn Multiple N/A
815-629 Shirland Multiple N/A
815-630 Joliet Multiple 7/24/2006
815-631 Sterling Multiple N/A
815-632 Sterling Multiple N/A
815-633 Rockford Illinois Bell Tel Co N/A
815-634 Coal City Multiple N/A
815-635 Chatsworth Multiple N/A
815-636 Rockford Illinois Bell Tel Co N/A
815-637 Rockford Illinois Bell Tel Co N/A
815-638 La Moille Multiple N/A
815-639 Rockford Illinois Bell Tel Co N/A
815-640 Ottawa Multiple 12/28/2001
815-641 Joliet Cellco Partnership 1/21/2008
815-642 Minooka Multiple N/A
815-643 Dover Multiple N/A
815-644 Crescent City Multiple N/A
815-645 Stilman Valley Multiple N/A
815-646 Tiskilwa Multiple N/A
815-647 Cullom Multiple N/A
815-648 Hebron Multiple N/A
815-649 Gardner Multiple N/A
815-650 Freeport Multiple N/A
815-651 Joliet Multiple N/A
815-652 Grand Detour Multiple N/A
815-653 Wonder Lake Multiple N/A
815-654 Rockford Illinois Bell Tel Co N/A
815-655 Coal City Multiple 2/18/2019
815-656 Freeport Multiple 6/26/2002
815-657 Forrest Multiple N/A
815-658 Newark Multiple 8/2/2019
815-659 Bureau Multiple N/A
815-660 Lockport Multiple N/A
815-661 Morris Multiple N/A
815-662 Momence Multiple N/A
815-663 Spring Valley Multiple N/A
815-664 Spring Valley Multiple N/A
815-665 Ottawa Multiple N/A
815-666 Joliet Multiple 8/30/2006
815-667 Utica Multiple N/A
815-668 Rockford Multiple 4/2/2009
815-669 Mchenry Multiple N/A
815-670 Rockford Multiple N/A
815-671 Joliet Multiple N/A
815-672 Streator Frontier North N/A
815-673 Streator Multiple N/A
815-674 Streator New Cingular Wireless PCS N/A
815-675 Spring Grove Multiple N/A
815-676 Plainfield Multiple N/A
815-677 Dixon Multiple 3/17/2005
815-678 Richmond Multiple N/A
815-679 Mchenry Multiple N/A
815-680 Manhattan Multiple N/A
815-681 Oglesby Multiple 7/30/2010
815-682 Stockland Multiple N/A
815-683 Crescent City Multiple N/A
815-684 Chadwick Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-685 Joliet New Cingular Wireless PCS N/A
815-686 Piper City Multiple N/A
815-687 Woodstock Multiple N/A
815-688 Strawn Multiple N/A
815-689 Cullom Frontier Communications Of Illinois N/A
815-690 Joliet Multiple N/A
815-691 Utica Multiple N/A
815-692 Fairbury Multiple N/A
815-693 Joliet T-Mobile USA N/A
815-694 Clifton Multiple N/A
815-695 Newark Multiple N/A
815-696 Roscoe Aero North Communications 5/27/2003
815-697 Chebanse Multiple N/A
815-698 Ashkum Multiple N/A
815-699 Wyanet Multiple N/A
815-701-XXXX --- 815-799-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-701 Woodstock Multiple 4/2/2002
815-702 Saunemin Multiple N/A
815-703 Rockford T-Mobile USA 6/4/2002
815-704 South Beloit Multiple 2/23/2001
815-705 Morris Multiple 12/28/2001
815-706 Rockford Multiple 9/3/2019
815-707 Gilman Multiple 12/6/2001
815-708 Rockford Multiple 6/23/2006
815-709 Coal City Multiple 12/28/2001
815-710 Morris Multiple 1/24/2001
815-712 La Salle Multiple 7/5/2002
815-713 Rockford Multiple 9/28/2001
815-714 Joliet Multiple N/A
815-715 Joliet New Cingular Wireless PCS 5/22/2001
815-716 Sterling Multiple 10/31/2001
815-717 New Lenox Multiple N/A
815-718 Sterling Multiple 10/22/2002
815-719 Princeton Multiple 7/5/2002
815-720 Rockford Illinois Bell Tel Co N/A
815-721 Rockford Multiple N/A
815-722 Joliet Illinois Bell Tel Co N/A
815-723 Joliet Illinois Bell Tel Co N/A
815-724 Joliet Illinois Bell Tel Co N/A
815-725 Joliet Illinois Bell Tel Co N/A
815-726 Joliet Illinois Bell Tel Co N/A
815-727 Joliet Illinois Bell Tel Co N/A
815-728 Wonder Lake Multiple N/A
815-729 Joliet Illinois Bell Tel Co N/A
815-730 Joliet Illinois Bell Tel Co N/A
815-731 Plainfield Illinois Bell Tel Co 2/16/2006
815-732 Oregon Multiple N/A
815-733 Plainfield Multiple N/A
815-734 Mount Morris Multiple N/A
815-735 Joliet New Cingular Wireless PCS N/A
815-736 Lisbon Multiple N/A
815-737 South Sharon Sharon Tel. Co. N/A
815-738 Leaf River Leaf River Telephone Co. N/A
815-739 Sycamore MetroPCS N/A
815-740 Joliet Illinois Bell Tel Co N/A
815-741 Joliet Illinois Bell Tel Co N/A
815-742 Rockford United States Cellular N/A
815-743 Graymont Multiple N/A
815-744 Joliet Illinois Bell Tel Co N/A
815-745 Warren Multiple N/A
815-746 Marseilles Marseilles Tel. Co. Of Marseilles 5/13/2008
815-747 East Dubuque Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-748 De Kalb Frontier North N/A
815-749 Lockport Multiple 8/19/2022
815-750 Marseilles Mtco Communications 1/23/2003
815-751 De Kalb Cellco Partnership N/A
815-752 De Kalb Frontier North N/A
815-753 De Kalb Frontier North N/A
815-754 De Kalb Frontier North N/A
815-755 Seneca Multiple 1/8/2016
815-756 De Kalb Multiple N/A
815-757 De Kalb United States Cellular N/A
815-758 De Kalb Frontier North N/A
815-759 Mchenry Illinois Bell Tel Co N/A
815-760 Bureau Multiple 10/25/2005
815-761 De Kalb Cellco Partnership N/A
815-762 De Kalb Cellco Partnership N/A
815-763 Joliet Multiple 10/11/2022
815-764 De Kalb Multiple N/A
815-765 Poplar Grove Multiple N/A
815-766 De Kalb Multiple N/A
815-767 La Grange American Messaging Services 4/16/2001
815-768 Joliet Multiple N/A
815-769 Seneca Multiple 4/27/2001
815-770 Harvard Multiple 2/13/2006
815-771 Ashkum Multiple N/A
815-772 Morrison Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-773 Joliet Illinois Bell Tel Co N/A
815-774 Joliet Illinois Bell Tel Co N/A
815-775 Woodstock USA Mobility Wireless N/A
815-776 Galena Multiple N/A
815-777 Galena Illinois Bell Tel Co N/A
815-778 Lyndon Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-779 Plainfield Multiple 02/08/2024
815-780 La Salle Multiple 8/22/2001
815-781 Chebanse Multiple N/A
815-782 Plainfield Multiple N/A
815-783 Gilman Multiple N/A
815-784 Genoa Multiple N/A
815-785 Watseka Multiple N/A
815-786 Sandwich Multiple N/A
815-787 De Kalb Frontier North N/A
815-788 Crystal Lake Multiple 3/22/2001
815-789 Orangeville Multiple N/A
815-790 Woodstock T-Mobile USA N/A
815-791 Joliet Multiple 7/24/2001
815-792 Harding Multiple N/A
815-793 De Kalb T-Mobile USA 6/25/2001
815-794 Marseilles Multiple N/A
815-795 Marseilles Multiple N/A
815-796 Flanagan Multiple N/A
815-797 Somonauk Multiple 12/6/2001
815-798 Milledgeville Aero North Communications N/A
815-799 Manlius Multiple 8/22/2001
815-800-XXXX --- 815-899-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-800 Poplar Grove Multiple 3/24/2010
815-801 Freeport Aero North Communications N/A
815-802 Kankakee Multiple 9/28/2001
815-803 Byron Aero North Communications 3/22/2001
815-804 Pecatonica Aero North Communications N/A
815-805 Durand Aero North Communications N/A
815-806 Frankfort Multiple N/A
815-807 German Valley Aero North Communications N/A
815-808 Winslow Aero North Communications N/A
815-809 Lena Aero North Communications N/A
815-810 Pearl City Aero North Communications N/A
815-812 Dakota Aero North Communications N/A
815-813 Apple River Aero North Communications N/A
815-814 Woodstock T-Mobile USA 4/27/2001
815-815 Ladd Multiple 09/30/2024
815-816 Cedarville Aero North Communications N/A
815-817 Hanover Aero North Communications N/A
815-818 Warren Aero North Communications N/A
815-819 Orangeville Aero North Communications N/A
815-820 Elizabeth Aero North Communications N/A
815-821 Freeport Multiple 5/22/2001
815-822 Streator Multiple 4/27/2001
815-823 Joliet Multiple N/A
815-824 Shabbona Multiple N/A
815-825 Malta Multiple N/A
815-826 Somonauk Multiple 5/12/2004
815-827 Maple Park Multiple N/A
815-828 Minooka Multiple 8/22/2001
815-829 Chadwick Aero North Communications N/A
815-830 Oglesby New Cingular Wireless PCS N/A
815-831 Davis Aero North Communications N/A
815-832 Saunemin Frontier Communications Of Illinois N/A
815-833 Mcconnell Aero North Communications N/A
815-834 Lockport Multiple N/A
815-835 Dixon Aero North Communications N/A
815-836 Lockport Multiple N/A
815-837 Forreston Aero North Communications N/A
815-838 Lockport Illinois Bell Tel Co N/A
815-839 Kankakee Multiple N/A
815-840 Stockton Aero North Communications N/A
815-841 Mount Morris Aero North Communications N/A
815-842 Pontiac Multiple N/A
815-843 Ashton Aero North Communications N/A
815-844 Pontiac Multiple N/A
815-845 Scales Mound Multiple N/A
815-846 Joliet Level 3 Communications N/A
815-847 Rockford Multiple 4/18/2005
815-848 Pontiac Cellco Partnership N/A
815-849 Sublette Multiple N/A
815-850 Seward Aero North Communications N/A
815-851 Kankakee USA Mobility Wireless N/A
815-852 Scales Mound Aero North Communications N/A
815-853 Wenona Multiple N/A
815-854 Long Point Multiple N/A
815-855 Milledgeville Multiple 4/2/2002
815-856 Leonore Leonore Mutual Tel. Co. N/A
815-857 Amboy Multiple N/A
815-858 Elizabeth Multiple N/A
815-859 Rochelle Multiple 9/30/2019
815-860 Elwood Multiple 3/5/2010
815-861 Woodstock New Cingular Wireless PCS N/A
815-862 Richmond Multiple 11/18/2008
815-863 Rutland Multiple N/A
815-864 Shannon Multiple N/A
815-865 Davis Multiple N/A
815-866 Princeton Cellco Partnership N/A
815-867 Pontiac Multiple 4/27/2001
815-868 Mcconnell Multiple N/A
815-869 Magnolia Multiple N/A
815-870 Rockford USA Mobility Wireless N/A
815-871 Rockford United States Cellular N/A
815-872 Princeton Frontier North N/A
815-873 New Milford Multiple N/A
815-874 New Milford Frontier North N/A
815-875 Princeton Multiple N/A
815-876 Princeton Multiple N/A
815-877 Rockford Illinois Bell Tel Co N/A
815-878 Princeton New Cingular Wireless PCS N/A
815-879 Princeton Multiple N/A
815-880 Woodstock Multiple 1/24/2001
815-881 Oregon Multiple N/A
815-882 Mcnabb Mcnabb Tel. Co. N/A
815-883 Oglesby Multiple N/A
815-884 Earlville Multiple 3/23/2010
815-885 Rock Cut Multiple N/A
815-886 Lockport Illinois Bell Tel Co N/A
815-887 Harvard Multiple 5/3/2002
815-888 Rochelle Multiple 11/27/2006
815-889 Milford Multiple N/A
815-890 New Milford Aero North Communications 5/27/2003
815-891 Winnebago Aero North Communications 6/25/2001
815-892 Stilman Valley Multiple 11/21/2019
815-893 Crystal Lake Multiple 12/30/2004
815-894 Ladd Multiple N/A
815-895 Sycamore Frontier North N/A
815-896 Shirland Aero North Communications 7/24/2001
815-897 Lyndon Multiple N/A
815-898 Massbach Aero North Communications 2/23/2001
815-899 Sycamore Frontier North N/A
815-900-XXXX --- 815-999-XXXX
NPANXX Area served[1] Provider[2] Date[3]
815-900 Mchenry Multiple 8/4/2010
815-901 De Kalb Multiple 2/14/2005
815-902 Thomson Multiple 6/25/2001
815-903 Mchenry American Messaging Services 2/27/2002
815-904 Rockford Multiple 8/31/2006
815-905 Lockport Multiple 2/27/2002
815-906 Mount Carroll Multiple 4/21/2006
815-907 Manteno Multiple 12/6/2001
815-908 Freeport Multiple N/A
815-909 De Kalb T-Mobile USA 5/22/2001
815-910 Mendota Cellco Partnership 6/25/2001
815-912 Belvidere Multiple 9/28/2001
815-913 Chadwick Multiple N/A
815-914 Rockford Multiple N/A
815-915 Princeton Multiple 12/28/2001
815-916 Plattville Multiple N/A
815-917 Rochelle Aero North Communications N/A
815-918 Clifton Multiple 8/22/2001
815-919 Joliet T-Mobile USA 2/23/2001
815-920 Cornell Multiple 11/22/2005
815-921 Rockford Illinois Bell Tel Co 4/27/2001
815-922 Kankakee Cellco Partnership N/A
815-923 Union Multiple N/A
815-924 Prophetstown Aero North Communications N/A
815-925 Hennepin Multiple N/A
815-926 Wilmington Multiple 5/22/2001
815-927 Joliet Multiple N/A
815-928 Kankakee Illinois Bell Tel Co N/A
815-929 Kankakee Illinois Bell Tel Co N/A
815-930 Elizabeth Multiple 6/4/2002
815-931 Joliet Multiple N/A
815-932 Kankakee Illinois Bell Tel Co N/A
815-933 Kankakee Illinois Bell Tel Co N/A
815-934 Emington Multiple N/A
815-935 Kankakee Illinois Bell Tel Co N/A
815-936 Kankakee Illinois Bell Tel Co N/A
815-937 Kankakee Illinois Bell Tel Co N/A
815-938 Forreston Multiple N/A
815-939 Kankakee Illinois Bell Tel Co N/A
815-940 Gardner Multiple 5/3/2002
815-941 Morris Illinois Bell Tel Co N/A
815-942 Morris Illinois Bell Tel Co N/A
815-943 Harvard Illinois Bell Tel Co N/A
815-944 Momence Multiple N/A
815-945 Chenoa Multiple N/A
815-946 Polo Multiple N/A
815-947 Stockton Multiple N/A
815-948 Hooppole Multiple N/A
815-949 Cabery Multiple N/A
815-951 Amboy Multiple N/A
815-952 Lanark Aero North Communications 7/18/2006
815-953 Kankakee Cellco Partnership N/A
815-954 Kankakee Cellco Partnership N/A
815-955 Joliet Multiple 7/5/2002
815-956 Morrison Citizens Telecom Co Illinois-Frontier Citizens -IL N/A
815-957 Rockton Multiple 2/22/2005
815-960 Leaf River North County Communication Corporation 6/4/2002
815-961 Rockford Illinois Bell Tel Co N/A
815-962 Rockford Illinois Bell Tel Co N/A
815-963 Rockford Illinois Bell Tel Co N/A
815-964 Rockford Illinois Bell Tel Co N/A
815-965 Rockford Illinois Bell Tel Co N/A
815-966 Rockford Illinois Bell Tel Co N/A
815-967 Rockford Illinois Bell Tel Co N/A
815-968 Rockford Illinois Bell Tel Co N/A
815-969 Rockford Multiple N/A
815-970 Sycamore Multiple 7/5/2002
815-971 Rockford Illinois Bell Tel Co N/A
815-972 Rockford Illinois Bell Tel Co N/A
815-973 Dixon United States Cellular N/A
815-974 Hebron Multiple 7/3/2018
815-975 Belvidere Multiple 9/3/2002
815-977 Rockford Multiple 6/25/2003
815-978 Rockford Cellco Partnership N/A
815-979 Rockford Cellco Partnership N/A
815-980 Rockford Multiple 6/15/2006
815-981 De Kalb Multiple 9/30/2002
815-982 Tampico Multiple N/A
815-983 Rockford American Messaging Services N/A
815-984 Wellington Multiple N/A
815-985 Rockford Cellco Partnership N/A
815-986 Rockford Paetec Itel N/A
815-987 Rockford Illinois Bell Tel Co N/A
815-988 Rockford United States Cellular N/A
815-989 Prophetstown Multiple 1/4/2005
815-990 Freeport Cellco Partnership 10/22/2002
815-991 Sycamore Multiple N/A
815-992 Streator Multiple 4/21/2005
815-993 Oglesby Multiple 9/22/2006
815-994 Dixon Multiple 4/14/2003
815-995 De Kalb Multiple 6/10/2009
815-996 Savanna Centurylink Communications N/A
815-997 Rockford Multiple 3/26/2003
815-998 Odell Multiple N/A
815-999 Joliet Multiple 7/14/2003
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: December 15, 2025

Cities in area code 815

City1 County Time zone1
Alden McHenry C
Amboy Lee C
Ancona Livingston C
Apple River Jo Daviess C
Arlington Bureau C
Aroma Park Kankakee C
Ashkum Iroquois C
Ashton Lee C
Baileyville Ogle C
Beaverville Iroquois C
Belvidere Boone C
Blackstone Livingston C
Bonfield Kankakee C
Bourbonnais Kankakee C
Braceville Grundy C
Bradley Kankakee C
Braidwood Will C
Buckingham Kankakee C
Bureau Bureau C
Byron Ogle C
Cabery Ford C
Caledonia Boone C
Campus Livingston C
Capron Boone C
Cedar Point La Salle C
Cedarville Stephenson C
Chadwick Carroll C
Chana Ogle C
Channahon Will C
Chatsworth Livingston C
Chebanse Iroquois C
Chenoa McLean C
Cherry Bureau C
Cherry Valley Winnebago C
Cissna Park Iroquois C
Clare Dekalb C
Claytonville Iroquois C
Clifton Iroquois C
Coal City Grundy C
Compton Lee C
Cornell Livingston C
Cortland Dekalb C
Crescent City Iroquois C
Creston Ogle C
Crystal Lake McHenry C
Cullom Livingston C
Dakota Stephenson C
Dalzell Bureau C
Dana La Salle C
Danforth Iroquois C
Davis Stephenson C
Davis Junction Ogle C
Deer Grove Whiteside C
Dekalb Dekalb C
Depue Bureau C
Dixon Lee C
Donovan Iroquois C
Dover Bureau C
Durand Winnebago C
Dwight Livingston C
Earlville La Salle C
East Dubuque Jo Daviess C
Eldena Lee C
Eleroy Stephenson C
Elizabeth Jo Daviess C
Elwood Will C
Emington Livingston C
Esmond Dekalb C
Essex Kankakee C
Fairbury Livingston C
Flanagan Livingston C
Forrest Livingston C
Forreston Ogle C
Frankfort Will C
Franklin Grove Lee C
Freeport Stephenson C
Fulton Whiteside C
Galena Jo Daviess C
Galt Whiteside C
Garden Prairie Boone C
Gardner Grundy C
Genoa Dekalb C
German Valley Stephenson C
Gilman Iroquois C
Goodwine Iroquois C
Grand Ridge La Salle C
Grant Park Kankakee C
Granville Putnam C
Graymont Livingston C
Hanover Jo Daviess C
Harmon Lee C
Harvard McHenry C
Hebron McHenry C
Hennepin Putnam C
Herscher Kankakee C
Hinckley Dekalb C
Holcomb Ogle C
Homer Glen Will C
Hooppole Henry C
Hopkins Park Kankakee C
Iroquois Iroquois C
Joliet Will C
Kankakee Kankakee C
Kasbeer Bureau C
Kempton Ford C
Kent Stephenson C
Kingston Dekalb C
Kinsman Grundy C
Kirkland Dekalb C
La Moille Bureau C
La Salle La Salle C
Ladd Bureau C
Lanark Carroll C
Leaf River Ogle C
Lee Lee C
Lee Center Lee C
Leland La Salle C
Lena Stephenson C
Leonore La Salle C
Lindenwood Ogle C
Lockport Will C
Long Point Livingston C
Lostant La Salle C
Loves Park Winnebago C
Lyndon Whiteside C
Machesney Park Winnebago C
Magnolia Putnam C
Malden Bureau C
Malta Dekalb C
Manhattan Will C
Manlius Bureau C
Manteno Kankakee C
Maple Park Kane C
Marengo McHenry C
Mark Putnam C
Marseilles La Salle C
Martinton Iroquois C
Mazon Grundy C
Mc Connell Stephenson C
Mc Nabb Putnam C
McHenry McHenry C
Mendota La Salle C
Milford Iroquois C
Milledgeville Carroll C
Millington Kendall C
Minooka Grundy C
Momence Kankakee C
Monroe Center Ogle C
Morris Grundy C
Morrison Whiteside C
Mount Carroll Carroll C
Mount Morris Ogle C
Nachusa Lee C
New Bedford Bureau C
New Lenox Will C
Newark Kendall C
Nora Jo Daviess C
Odell Livingston C
Oglesby La Salle C
Ohio Bureau C
Onarga Iroquois C
Orangeville Stephenson C
Oregon Ogle C
Ottawa La Salle C
Papineau Iroquois C
Paw Paw Lee C
Pearl City Stephenson C
Pecatonica Winnebago C
Peru La Salle C
Piper City Ford C
Plainfield Will C
Polo Ogle C
Pontiac Livingston C
Poplar Grove Boone C
Princeton Bureau C
Prophetstown Whiteside C
Putnam Putnam C
Ransom La Salle C
Reddick Kankakee C
Richmond McHenry C
Ridott Stephenson C
Ringwood McHenry C
Rochelle Ogle C
Rock City Stephenson C
Rock Falls Whiteside C
Rockford Winnebago C
Rockton Winnebago C
Romeoville Will C
Roscoe Winnebago C
Rutland La Salle C
Sandwich Dekalb C
Saunemin Livingston C
Savanna Carroll C
Scales Mound Jo Daviess C
Seatonville Bureau C
Seneca La Salle C
Serena La Salle C
Seward Winnebago C
Shabbona Dekalb C
Shannon Carroll C
Sheffield Bureau C
Sheldon Iroquois C
Sheridan La Salle C
Shirland Winnebago C
Somonauk Dekalb C
South Beloit Winnebago C
South Wilmington Grundy C
Spring Grove McHenry C
Spring Valley Bureau C
St Anne Kankakee C
Standard Putnam C
Sterling Whiteside C
Steward Lee C
Stillman Valley Ogle C
Stockland Iroquois C
Stockton Jo Daviess C
Strawn Livingston C
Streator La Salle C
Sublette Lee C
Sycamore Dekalb C
Tampico Whiteside C
Thomson Carroll C
Tiskilwa Bureau C
Toluca Marshall C
Tonica La Salle C
Triumph La Salle C
Troy Grove La Salle C
Union McHenry C
Union Hill Kankakee C
Utica La Salle C
Van Orin Bureau C
Verona Grundy C
Walnut Bureau C
Warren Jo Daviess C
Waterman Dekalb C
Watseka Iroquois C
Wedron La Salle C
Wellington Iroquois C
Wenona Marshall C
West Brooklyn Lee C
Wilmington Will C
Winnebago Winnebago C
Winslow Stephenson C
Wonder Lake McHenry C
Woodland Iroquois C
Woodstock McHenry C
Woosung Ogle C
Wyanet Bureau C
  1. Listed above are most places served by USA area code 815. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. C stands for Central Time (currently ).
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